What make girls do
that? Does it mean they changed their sexual orientation?

Answer:

What makes girls do that? Doesn’t
it mean they changed their sexual orientation? I find these to be interesting questions. All stereotypical “male” and “female”
behavior has to do with socially-constructed gender roles and gender-based
ideologies. There’s absolutely nothing wrong with a female calling her female
friends “my wife” or “honey”. Just
as there is nothing wrong with males calling their male friends a “man crush”
or saying that they love each other.
However, we live in a very sexist, homophobic world where people
automatically assign a sexual orientation label to people depending on how much
they conform to the dictated rules and roles assigned to their gender.

When the term “homophobia” was
first coined in the 1970s, it was described as a mental disorder, a condition
relating to the irrational fear of homosexuality or homosexual people. Over the
decades, this definition of homophobia has evolved to include all of the
negative feelings and attitudes that people have about being gay or
bisexual. Although common among
both sexes, men and women have been found to experience homophobia for slightly
different reasons. According to
Basow and Johnson (2008), women who scored high on homophobia tended to
disagree with sex role egalitarianism, held authoritarian attitudes, and
perceived stereotypical feminine attributes as being of great importance to
their personal sense of femininity.
Homophobia among men, on the other hand, is mostly related to the
cultural expectations of masculinity. Homophobia plays a significant role
in maintaining patriarchal power structures.

In U.S. culture (and in cultures
throughout the world including China), the social construction of masculinity
and femininity has been formulated and promulgated in a way that highly values
“masculine traits,” while devaluing “feminine traits.” To be masculine is often seen as being
strong, powerful, dominating, unemotional and violent, whereas being feminine
is often viewed as being sensitive, maternal, submissive, passive, and
weak. American males are pushed to
separate themselves from all that is feminine in order to prove their
“manliness”. This societal
pressure often manifests into violence against women, gay-bashing and
homophobia. In fact, being homophobic and participating in gay-bashing is often
viewed as a rite of passage into “manhood” by many young males. Because male
homosexuality is often erroneously associated with femininity, it violates the
strict gender norms of traditional masculinity. Homophobic bullying destroys lives. Avoiding discussions of homophobia,
homosexuality, and sexist gender ideologies can help foster a culture of
intolerance and non-acceptance, thereby allowing violence against
non-heterosexuals and women to flourish.

So, NO, females calling females “my
wife” or “sweetie” or saying “I love you” doesn’t necessarily have any
connection to sexual orientation.
I mean it could have, but just as likely may not have. And NO, people
don’t change their sexual orientation; their decision to hide or show their
sexual orientation is often based on how safe they feel they are in doing
so. Heterosexual females often express such
“terms of endearment” to other heterosexual females, but so do homosexual and
bisexual females. In both Chinese
and North American societies, same sex affection is often something tolerated
among women, however, same sex affection among men, regardless of their sexual
orientation is rarely tolerated, and is often attacked.

It’s sad to me that people,
especially men, are forced into tiny, oppressive, and extremely limited gender
boxes. In my opinion, it robs men
of their freedom to be who they truly are. Women are imprisoned by their gender boxes as well, however,
they are often given more freedom to be affectionate with other women, or even
to be sexual with other women. But
of course, that’s often for the sole benefit of a man's sexual fantasies.